參數(shù)資料
型號： MC68L11F1CFN3
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, EEPROM, MICROCONTROLLER, PQCC68
封裝： PLASTIC, LCC-68
文件頁數(shù)： 21/174頁
文件大?。?/td> 981K
代理商： MC68L11F1CFN3
MC68HC11F1
TIMING SYSTEM
MOTOROLA
TECHNICAL DATA
9-11
9.3.8 Timer Interrupt Flag Register 1
Bits in this register indicate when timer system events have occurred. Coupled with
the bits of TMSK1, the bits of TFLG1 allow the timer subsystem to operate in either a
polled or interrupt driven system. Each bit of TFLG1 corresponds to a bit in TMSK1 in
the same position.
Clear flags by writing a one to the corresponding bit position(s).
OC1F–OC4F — Output Compare x Flag
Set each time the counter matches output compare x value
I4/O5F — Input Capture 4/Output Compare 5 Flag
Set by IC4 or OC5, depending on the function enabled by I4/O5 bit in PACTL
IC1F–IC3F — Input Capture x Flag
Set each time a selected active edge is detected on the ICx input line
9.3.9 Timer Interrupt Mask Register 2
Use this 8-bit register to enable or inhibit timer overflow and real-time interrupts. The
timer prescaler control bits are included in this register.
TOI — Timer Overflow Interrupt Enable
0 = TOF interrupts disabled
1 = Interrupt requested when TOF is set to one
RTII — Real-Time Interrupt Enable
PAOVI — Pulse Accumulator Overflow Interrupt Enable
PAII — Pulse Accumulator Input Edge Interrupt Enable
PR[1:0] — Timer Prescaler Select
These bits are used to select the prescaler divide-by ratio. In normal modes, PR[1:0]
can only be written once, and the write must be within 64 cycles after reset. Refer to
Table 9-1 and Table 9-4 for specific timing values.
TFLG1 — Timer Interrupt Flag 1
$1023
Bit 7
654321
Bit 0
OC1F
OC2F
OC3F
OC4F
I4/O5F
IC1F
IC2F
IC3F
RESET:
0000000
0
TMSK2 — Timer Interrupt Mask 2
$1024
Bit 7
654321
Bit 0
TOI
RTII
PAOVI
PAII
—
PR1
PR0
RESET:
0000000
0
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